A4VSO泵具有泵具有噪音低、体积小、自吸能力好、可靠性高等优点。在闭式系统上应用，油泵变量过零位时一般柱塞泵都有托盘现象，唯独D-A4VSO泵有效解决此类问题，因补油泵、控制泵可以串接、控制阀可以集成在泵盖上，其结构非常紧凑;另外，比例泵均带有位移传感器闭式反馈回路，其零位控制精度非常高。广泛应用于：冶金行业、锻压行业、船舶行业、船舶等等领域。A4VSO系列规格有40、71、125、180、250:;变量形式有恒压，恒功率、液动、负载感应、比例、伺服、压力流量复合控制形式;有开式系统泵和闭式系统泵。A10-FR01B-12,A10-FR01C-12,A10-FR01H-12,
A70-FR01BS-60,A70-FR01CS-60,A70-FR01HS-60,A70-FR01KS-60,
A90-FR01BS-60,A90-FR01CS-60,A90-FR01HS-60,A90-FR01KS-60,
A145-FR01BS-60,A145-FR01CS-60,A145-FR01HS-60,A145-FR01KS-60,
A16-F-R-01-B-K-32,A16-F-R-01-C-K-32,A16-F-R-01-H-K-32,
A22-F-R-01-B-K-32,A22-F-R-01-C-K-32,
A37-F-R-01-B-K-32,A37-F-R-01-C-K-32,A37-F-R-01-H-K-32,
A56-F-R-01-B-K-32,A56-F-R-01-C-K-32,A56-F-R-01-H-K-32,
A220-F-R-01-B-S-60,A220-F-R-01-C-S-60,A220-F-R-01-H-S-60,A220-F-R-01-K-S-60.
A125-F-R-01-B-S-60,A125-F-R-01-C-S-60,A125-F-R-01-H-S-60,A125-F-R-01-K-S-60.
A16-F-R-01-B-S-K-32,A16-F-R-01-C-S-K-32,A16-F-R-01-H-S-K-32,
A22-F-R-01-B-S-K-32,A22-F-R-01-C-S-K-32,
A37-F-R-01-B-S-K-32,A37-F-R-01-C-S-K-32,A37-F-R-01-H-S-K-32,
A56-F-R-01-B-S-K-32,A56-F-R-01-C-S-K-32,A56-F-R-01-H-S-K-32,
A70-LR01BS-60,A70-LR01CS-60,A70-LR01HS-60,A70-LR01KS-60,
A90-LR01BS-60,A90-LR01CS-60,A90-LR01HS-60,A90-LR01KS-60,
A145-LR01BS-60,A145-LR01CS-60,A145-LR01HS-60,A145-LR01KS-60,
A16-L-R-01-B-K-32,A16-L-R-01-C-K-32,A16-L-R-01-H-K-32,
A22-L-R-01-B-K-32,A22-L-R-01-C-K-32,
A37-L-R-01-B-K-32,A37-L-R-01-C-K-32,A37-L-R-01-H-K-32,
A56-L-R-01-B-K-32,A56-L-R-01-C-K-32,A56-L-R-01-H-K-32,
A220-L-R-01-B-S-60,A220-L-R-01-C-S-60,A220-L-R-01-H-S-60,A220-L-R-01-K-S-60.
A125-L-R-01-B-S-60,A125-L-R-01-C-S-60,A125-L-R-01-H-S-60,A125-L-R-01-K-S-60.
A16-L-R-01-B-S-K-32,A16-L-R-01-C-S-K-32,A16-L-R-01-H-S-K-32,
为此dlr加工制作了与排气、排液阀或旋塞相同螺纹的接头(又称为奶嘴)，如图所示对差压变送器进行校准时，先把三阀组的正、负阀门关闭，打开平衡阀门，然后旋松排气、排液阀或旋塞放空，然后把自制的接头接在正压室的排气、排液阀或旋塞的位置上；而负压室则保持旋松状态，使其通大气。压力源通过胶皮管与自制接头相连接，并检查气路密封情况，同时把电流表或电压表、手操器接入变送器输出电路中，通电预热后开始校准。常规差压变送器的校准先将阻尼调至零状态，先调零点，然后加满度压力调满量程，使输出为2mA,在现场调校讲的是快，在此介绍零点、量程的快速调校法。
